Hello Brian,

it is a Problem with the using of the multiprocess function. It is in your case not necessary to us it. It's more useful to use it for multiple data with n x m permutations. The core System calls it - depending of the mode for each data object in the Input stream. You have to create dummies for the Output in it, because the core System try to evaluate an Array of results as Long as the defined Outputs.
I've made some changes to your file - please study it. At the end it would be better and faster to process your curves in a for-loop and not in a multiprocess function.

Have a nice day
Karsten

p.s.: Nevertheless -Congratulations! It Works:-)